Highly convergent stereoselective synthesis of chiral key intermediates in the synthesis of Palinavir from imines derived from l-glyceraldehyde
作者:Ramón Badorrey、Carlos Cativiela、Marı́a D Dı́az-de-Villegas、José A Gálvez
DOI:10.1016/s0040-4020(01)01152-8
日期:2002.1
Imines derived from O-protected (S)-glyceraldehyde are valuable intermediates in the synthesis of different kinds of amino acids. We have developed a highly convergent and stereoselective method to obtain (2S,3S)-N-tert-butoxycarbonyl-1-phenyl-3,4-epoxy-2-butylamine and (2S,4R)-N-tert-butoxycarbonyl-4-hydroxypipecolic acid tert-butylamide, which are key intermediates in the synthesis of Palinavir,
衍生自O-保护的(S)-甘油醛的亚胺是合成不同种类氨基酸的有价值的中间体。我们已经开发了高会聚和立体选择性的方法来获得(2小号,3小号) - ñ -叔丁氧羰基氨基-1-苯基-3,4-环氧-2-丁胺和(2小号,4 - [R )- ñ -叔-丁氧基羰基-4-羟基哌酸叔酸-丁酰胺,是Palinavir合成中的关键中间体,包括分别用苄基溴化镁和Danishefsky's二烯处理适当的亚胺,然后将获得的加合物转化为所需化合物。的反应ñ -benzylimine衍生自(小号)-2,3-二- ö与苄基溴化镁-benzylglyceraldehyde是在低温下完全非对映选择性。(S)-2,3-二-O-苄基甘油醛与(R)-N -α-甲基苄基胺的亚胺杂Diels-Alder反应在低温存在ZnI 2的情况下是完全非对映选择性的。